fix(Xqci/Xqciint): xqciv0p13 changes

 - Fix IDL code of qc.c.mileaveret instruction to avoid restoring from stack NMIP and EXCP bits

Signed-off-by: Albert Yosher <[email protected]>

Author: ayosher

arch_overlay/qc_iu/ext/Xqci.yaml

@@ -441,6 +441,7 @@ versions:
   changes:
     - Fix version history of releases v0.11.0 and v0.12.0
     - Fix description and IDL code of qc.csrrwr instruction to allow just read CSR
+    - Fix IDL code of qc.c.mileaveret instruction to avoid restoring from stack NMIP and EXCP bits
   implies:
   - { name: Xqcia, version: "0.7.0" }
   - { name: Xqciac, version: "0.3.0" }
@@ -450,7 +451,7 @@ versions:
   - { name: Xqcicm, version: "0.2.0" }
   - { name: Xqcics, version: "0.2.0" }
   - { name: Xqcicsr, version: "0.4.0" }
-  - { name: Xqciint, version: "0.9.0" }
+  - { name: Xqciint, version: "0.10.0" }
   - { name: Xqciio, version: "0.1.0" }
   - { name: Xqcilb, version: "0.2.0" }
   - { name: Xqcili, version: "0.2.0" }

arch_overlay/qc_iu/ext/Xqciint.yaml

@@ -134,6 +134,19 @@ versions:
   changes:
     - Fix desciption of qc.c.eir instruction to match IDL code and functionality
   requires: { name: Zca, version: ">= 1.0.0" }
+- version: "0.10.0"
+  state: frozen
+  ratification_date: null
+  contributors:
+  - name: Albert Yosher
+    company: Qualcomm Technologies, Inc.
+    email: [email protected]
+  - name: Derek Hower
+    company: Qualcomm Technologies, Inc.
+    email: [email protected]
+  changes:
+    - Fix IDL code of qc.c.mileaveret instruction to avoid restoring from stack NMIP and EXCP bits
+  requires: { name: Zca, version: ">= 1.0.0" }
 description: |
   The Xqciint extension includes eleven instructions to accelerate interrupt
   servicing by performing common actions during ISR prologue/epilogue.

arch_overlay/qc_iu/inst/Xqci/qc.c.mileaveret.yaml

@@ -27,8 +27,11 @@ operation(): |
   XReg prev_retpc = read_memory<32>(virtual_address -  4, $encoding);
   XReg qc_mcause_val = read_memory<32>(virtual_address - 12, $encoding);
   Bits<1> nmie_val = CSR[mnstatus].NMIE;
+  XReg qc_mcause_prev_val = CSR[qc.mcause].sw_read();
+  XReg qc_mcause_nmip_excp_mask = (32'b1 << 24) | (32'b1 << 25);
+  XReg qc_mcause_new_val = (qc_mcause_val & ~qc_mcause_nmip_excp_mask) | (qc_mcause_prev_val & qc_mcause_nmip_excp_mask);
+  CSR[qc.mcause].sw_write(qc_mcause_new_val);
   X[ 8] = read_memory<32>(virtual_address -  8, $encoding);
-  CSR[qc.mcause].sw_write(qc_mcause_val);
   X[ 1] = read_memory<32>(virtual_address - 16, $encoding);
   X[ 5] = read_memory<32>(virtual_address - 24, $encoding);
   X[ 6] = read_memory<32>(virtual_address - 28, $encoding);
@@ -47,7 +50,7 @@ operation(): |
   X[31] = read_memory<32>(virtual_address - 80, $encoding);
   X[2] = X[2] + 96;
   if (nmie_val == 1'b1) {
-    XReg qc_mcause_val_masked = qc_mcause_val & ~(32'b1<<26) & ~(32'b1<<27) & ~(32'b1<<29) & ~(32'hFF<<12);
+    XReg qc_mcause_val_masked = qc_mcause_new_val & ~(32'b1<<26) & ~(32'b1<<27) & ~(32'b1<<29) & ~(32'hFF<<12);
     Bits<1> mpie_val = (qc_mcause_val >> 27) & 1;
     Bits<1> mpdt_val = (qc_mcause_val >> 29) & 1;
     Bits<4> mpil_val = (qc_mcause_val >> 16) & 0xF;
@@ -74,7 +77,7 @@ operation(): |
     }
     $pc = CSR[mepc].sw_read();
   } else {
-    XReg qc_mcause_val_masked = qc_mcause_val & ~(32'b1<<26) & ~(32'b1<<28) & ~(32'b1<<30) & ~(32'b1111<<12) & ~(32'b1111<<20);
+    XReg qc_mcause_val_masked = qc_mcause_new_val & ~(32'b1<<26) & ~(32'b1<<28) & ~(32'b1<<30) & ~(32'b1111<<12) & ~(32'b1111<<20);
     Bits<1> mnpie_val = (qc_mcause_val >> 28) & 1;
     Bits<4> mnpil_val = (qc_mcause_val >> 20) & 0xF;
     CSR[mstatus].MIE = mnpie_val;